Topic Explanation:
The initial post is asking for opinions on Marlen Manufacturing ostomy products as the user is interested in trying their barriers and wants feedback from others who have used their products.

Replies and Insights:
- Marlen is one of the secondary US manufacturers, offering varying deep convexity in a strong flower-like pattern.
- Marlen is the oldest of the original ostomy companies operating in the United States, offering a comprehensive and innovative line of products.
- Marlen has introduced various innovative products over the years, including the first post-operative pouch, lightweight and odor-proof plastic pouch, convexity to flat surfaced products, double-sided adhesive tape discs, and rings made from Karaya.
- Marlen's UltraMax line includes disposable convex pouches for Ileostomy, Colostomy, and Urostomy drainages, with various barrier choices and features like Kwick-View and UltraMax MiniMax.
- Marlen's UltraMax DEEP pouches feature a deep convex flange with a petal design, and they also offer the UltraMax GEMINI family of products with the E-Z Guide Locating System and AquaTack Hydrocolloid Barrier.
- Marlen products have worked well for some users, providing good wear time and comfort, especially for those with sensitive skin or who sweat easily.
- Some users have had positive experiences with Marlen products, finding them to be the only ones that work for them and providing significant improvements in wear time.
- Marlen has evolved over the years, coming into the modern age with their products.
- Some users have had mixed experiences with Marlen products, with concerns about the materials, lack of dramatic convexity, and suitability for specific types of ostomies.

Advice and Insights Summary:
1. Marlen offers a comprehensive and innovative line of products, including various convex pouches and barrier choices.
2. Users with sensitive skin or who sweat easily have found Marlen products to be the only ones that work for them, providing significant improvements in wear time and comfort.
3. Marlen has evolved over the years, coming into the modern age with their products, making them worth a try for those interested.
4. Some users have had mixed experiences with Marlen products, with concerns about the materials, lack of dramatic convexity, and suitability for specific types of ostomies.